Words starting with O

• order Amphipoda — Noun – English ～ small flat-bodied semiterrestrial crustaceans: whale lice; sand-hoppers; skeleton shrimp
• order Isoetales — Noun – English ～ aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales
• order Gadiformes — Noun – English ～ cods, haddocks, grenadiers; in some classifications considered equivalent to the order Anacanthini
• order Eurotiales — Noun – English ～ order of fungi having a closed ascocarp (cleistothecium) with the asci scattered rather than gathered in a hymenium
• order Lechanorales — Noun – English ～ category used in some classification systems for all lichens that produce apothecia
• order Liliales — Noun – English ～ an order of monocotyledonous plants including Amaryllidaceae and Liliaceae and Iridaceae
• order Fagales — Noun – English ～ an order of dicotyledonous trees of the subclass Hamamelidae
• order Fucales — Noun – English ～ coextensive with the family Fucaceae
• order Moniliales — Noun – English ～ order of imperfect fungi lacking conidiophores of having conidiophores that are superficial and not enclosed in a pycnidium
• order oedogoniales — Noun – English ～ simple or branched filamentous freshwater green algae
• order Gnetales — Noun – English ～ chiefly tropical or xerophytic woody plants; practically unknown as fossils but considered close to the ancestral line of angiosperms
• order Marsupialia — Noun – English ～ coextensive with the subclass Metatheria
• order Odonata — Noun – English ～ dragonflies and damselflies
• order Acarina — Noun – English ～ mites and ticks
• order — Noun – English ～ a degree in a continuum of size or quantity; "it was on the order of a mile"; "an explosion of a low order of magnitude"
• order Lyginopteridales — Noun – English ～ fossil gymnospermous trees or climbing plants from the Devonian: seed ferns
• Order — Noun – English ～ (usually plural) the status or rank or office of a Christian clergyman in an ecclesiastical hierarchy; "theologians still disagree over whether `bishop' should or should not be a separate Order"
• order Hymenoptera — Noun – English ～ an order of insects including: bees; wasps; ants; ichneumons; sawflies; gall wasps; etc.
• order Araneae — Noun – English ～ spiders
• order Campanulales — Noun – English ～ an order of plants of the subclass Asteridae including: Campanulaceae; Lobeliaceae; Cucurbitaceae; Goodeniaceae; Compositae

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